Dominance status and copulatory vocalizations among male stump-tailed macaques in Thailand
Dominance status and copulatory vocalizations among male stump-tailed macaques in Thailand
复制标题
DOI：
10.1007/s10329-020-00820-7
复制
发表时间：
2020-04
期刊：
影响因子：
1.7
通讯作者：
Aru Toyoda;T. Maruhashi;S. Malaivijitnond;H. Koda
中科院分区：
文献类型：
--
作者：
Aru Toyoda;T. Maruhashi;S. Malaivijitnond;H. Koda
雄性交配叫声有时在性策略中扮演重要角色，吸引同种雌性或向同种雄性宣传自己的社会地位。这些叫声通常发生在性竞争的社会中，如后宫群体和多男多女的社会。然而，呼叫功能仍然不清楚，因为有限的数据集，包括大量的雄性和雌性动物在自然环境中，特别是在灵长类动物。在这里，我们研究了可能的功能，男性特定的交配呼吁在野生短尾猕猴（猕猴arctoides）通过分析的背景和声学特征的发声。我们观察了395野生树桩尾猕猴居住在Khao Krapuk Khao Taomor非狩猎区在泰国和记录所有发生的观察交配。在383次交配记录中，我们统计了446种雄性特有的叫声，并测量了它们的声学特征。数据被分为三组，这取决于他们的社会地位：占主导地位的（阿尔法和联盟）男性和非主导男性。当比较男性的地位，阿尔法男性最频繁地产生交配呼叫射精，联盟男性产生的呼叫频率低于阿尔法男性，和其他非占主导地位的男性很少发声，保持沉默，即使在安装女性。声学分析表明，没有显着的影响，状态（阿尔法或联盟）的呼叫号码，回合持续时间，或进一步共振峰分散参数。我们的研究结果表明，雄性交配的呼吁，这一物种的社会地位依赖的信号。此外，占优势的雄性可能会积极地将自己的社会地位和交配行为传递给其他雄性竞争对手，以阻止他们的挑战性攻击，而其他非占优势的雄性则保持沉默，以防止占优势的干扰。
Male copulation calls sometimes play important roles in sexual strategies, attracting conspecific females or advertising their social status to conspecific males. These calls generally occur in sexually competitive societies such as harem groups and multi-male and multi-female societies. However, the call functions remain unclear because of limited availability of data sets that include a large number of male and female animals in naturalistic environments, particularly in primates. Here, we examined the possible function of male-specific copulation calls in wild stump-tailed macaques (Macaca arctoides) by analyzing the contexts and acoustic features of vocalizations. We observed 395 wild stump-tailed macaques inhabiting the Khao Krapuk Khao Taomor Non-Hunting Area in Thailand and recorded all occurrences of observed copulations. We counted 446 male-specific calls in 383 copulations recorded, and measured their acoustic characteristics. Data were categorized into three groups depending on their social status: dominant (alpha and coalition) males and non-dominant males. When comparing male status, alpha males most frequently produced copulation calls at ejaculation, coalition males produced less frequent calls than alpha males, and other non-dominant males rarely vocalized, maintaining silence even when mounting females. Acoustic analysis indicated no significant influence of status (alpha or coalition) on call number, bout duration, or further formant dispersion parameters. Our results suggest that male copulation calls of this species are social status-dependent signals. Furthermore, dominant males might actively transmit their social status and copulations to other male rivals to impede their challenging attacks, while other non-dominant males maintain silence to prevent the interference of dominants.